Update User List in README.md (#6758)
Update User List in README.md (#6758)

Added a new company into the company list
airbnb/caravel,apache/incubator-superset,apache/incubator-superset,apache/incubator-superset,airbnb/superset,mistercrunch/panoramix,airbnb/caravel,apache/incubator-superset,zhouyao1994/incubator-superset,zhouyao1994/incubator-superset,zhouyao1994/incubator-superset,airbnb/superset,airbnb/superset,zhouyao1994/incubator-superset,airbnb/caravel,apache/incubator-superset,mistercrunch/panoramix,mistercrunch/panoramix,zhouyao1994/incubator-superset,airbnb/superset,mistercrunch/panoramix,airbnb/caravel